Why does the Chat window not open for the Apple Store

I was at the Apple Store and clicked on the "Chat Now" button and tried the other "Chat" link. Both brought up a pop-up link but the window was blank. I tried it several times to no avail.

I thought I would send it back to Apple as feedback but I could not find a feedback option in the menu.

I am using the latest version of Safari, 6.0.2 (8536.26.17)